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Finding the Fourth Proportional to 2,647.87, 3,654 and 1,528.81

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Solution

The fourth proportional to 2,647.87, 3,654 and 1,528.81 is: 2,109.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.87 : 3,654 = 1,528.81 : x
  2. Step 2: Convert to fraction form
    2,647.87/3,654 = 1,528.81/x
  3. Step 3: Cross multiply
    2,647.87x = 3,654 × 1,528.81
  4. Step 4: Simplify right side
    2,647.87x = 5,586,271.74
  5. Step 5: Solve for x
    x = 5,586,271.74/2,647.87
  6. Step 6: Final answer
    x = 2,109.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.